Laurel's been using the phrase "my sister" regularly. It doesn't make sense to me until today, since she's an only child and I don't think she bonded that closely with the nerdsprout (Vogon's daughter).
[drum roll please]
While I was waking up from a nap this afternoon, she came into the bedroom and said "My sister!" to the cat.
I'm pleased she understands that Biko is a girl, but I'm not sure how to explain to people that the sister she refers to is a cat.
amused